Stoker-adjusting mechanism



3 ShetKs-Sheet C. E. HARRISON STOKER ADJUSTING` MECHANISM Filed Feb. 4; 1925 June 26, 192s.

June 26, 1928.

c. E. HARRISON STOKER ADJUSTING MECHANISM Filed Feb. 4,' 1925 SYS'hetS-Shee't 2 June 26, 1928.

1,675,268 C. E. HARRISON l sToKER ADJUSTING MECHANISM sheets-sheet v 5 Filed Feb. 4,

Patented June ze, 192s;

UNITED sfr-Ares PATENr oFFi-cs.

CLIFFORD E. HARRISON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 AMIEIBJI-k CAN ENGINEERING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, VAAl CORPORA- 'rien or PENNSYLVANIA. I`

STOKER-ADJUSTING MECHANISM.

Application led February 4, 1925. Serial No. 6,780`

My invention relates tostokers, and it has for one object the provision of mechanism that shall permit a quick change in the stroke of one or more fuel pushers.

Another object ofmy invention is to 'provide mechanism of the class described that shall be adapted to permit a change in stroke of the driven apparatus during the normal' operation of the same1 thus avoiding the 'necessi'y of shutting down the stoker mech anism.

A further object of my invention is to provide stroke-adjusting mechanism comprising a driving member, a ldriven 'member having aslot terminating in at least one abutment at one end and a pluralityv of abutment-s at the other end, a supportingpin extending from said drivingv member into said slot, a tongue ext-ending from said pin and so movable as to engage the 'desired one of said plurality of abutments, and means tending to maintain said tongue in the position necessary to engage the desired abutment.

Other objects and applications of my invention, as well as details of construction and operation, whereby my invention maybe practiced, will appear more fully hereinafter, when taken in connection with the accompanying drawing wherein Fig. 1 is a vertical sectional view of the front portion of an inclinedun'derfeed stoker embodying my invention;

Fig. 2 is an enlarged detail side elevational view of the stroke-varying mechanism of Fig. 1 adjusted for the maximum stroke;

Fig. 3 is a view similar to Fig. 2 but show-r ing the mechanism as adjusted forthe minimum stroke;

Fig. f1 is an end elevational view of the struc-tures of Figs. 2 and 3;

Fig. 5 is a perspective view of the movable tongue and associated shaft lport-ion; and

Fig. 6 is an elevational view of the weighted member that is designed to actuate and thereafter to maintain the tongue of Fig. 5 in either kof the positions shown in Figs. 2 and 3.

In the illustrated.embodiment ofmy invention shown in the drawings, a structure 1 of the inclined under-feed type comprises any suitable number of sets of tuyres 2, arranged in stepped formation and extending downwardly from a furnace opening. 3

chamber or retort 6. The fuel may be positively fed from' the casing 8 by means of a ram 9. The latter is operatively secured by a connecting rod 11 to a crank 12 actuated by a Huid motor 13 or other source of power.

vThe fuel may be forced from each of the retorts 6 up on to thetuyres 2 by means of plungers 14C and 15 which are slidablyj mounted on base plates 16 and 17, respectively, disposed adjacent to the base of the ,retort 6. Inasmuch as it `is desirable to vary the rate at whichthe fuel is advanced from the retorts 6 up on to the tuyeres2,it

yin a front wall 4 of a furnace 5.,v Between has heretofore been .the practice to'provide v stroke-varying means 18 of the form shown in Fig. 1. As therein illustrated, a driving member 19, which is pivotally secured at 21 to the connectingrod 11 andat 22 to a pivotal arm 23 extending from a Vsupporting section 211 of the furnace framework,`is pivotally secured at 25 yto a sleeve 26. The sleeve 26k is movable on a rod 27 intermediate spaced. abutments 28 and 29. The rod 27 may be secured to an extension grate rod 31 to be reciprocated. Y

When the connect-ing rod 11 is actuated in .accordance with the `movement of the crank 12, the driving member 19 is reciprocated about the pivotal supporting point 22, thus causingthe sleeve 26 to engage succes# sively the ab-utments 28 and 29 and the grate rod 31 to be moved in opposite directions. With such construction, the stroke of the extension grate rod 31 may be varied only` by mounting one or more washers 32 on the rod 27 intermediate one ofthe abutments 28 29 and thereciprocatorysleeve 26.- As will be readily apparent, the positioning ory removal of the washers 32 would necessitate the shutting down of the stoker mechanism and thereafter the removal of the associated parts.

In accordance with my invention, the above-noted undesirable results are entirely eliminated' and the adjustment of the stroke' l of the plungers 14 and 15 may be effected during the normal operation of the stoker drivinor mechanism. Referring to the dra-W- ings,tI1e rams 14 and 15 have pusher rods 33 and 34 associated with the driving member 19 through special `connections 35 and 3 6, respectively. Since these connections are fundamentally the same, only one connection will be described in detail, say 35.

The connection 35 may comprise a pin or .so-called power-transmitting element 37 (Fig. 5), ends 38 and 39 of which are respcctively journaled in elongated members 41 and 42, forming the driving member 1 9. The members 41 and 42 may be secured in this relation by bolt-s 43 and spacer tubes 44 (Fig. 4). The outer end of the pusher rod 33 is provided with a main longitudinally ,extending slot45, inner and outer ends 46 and 47 ot .which are designed to serve asv The slot 45 is of such dimen-` abutments. sions as .to receive the pin 37, whereby a `s lidalolc support may be provided by the driving member 194 for the outer end oi' the pusher rodv 33. An upper side 43 of the slot 45 engages .the pivotal supporting 1in 37, constituting a track for the same.

An inner` side ol the supporting pin` 37 is provided with a projecting tongue which is movable in the` slot 45, in accordance with the operation of the driving member 19, into and out of engagement with the inner abutment 46. An opposite sidel of the shaft 37 is movable into and out of engagement with the iouter abutment 47 formed by the slot 45. Thus the reciprocation 'of the pin 37 and the tongue 49 occurring upon the operation of the crank 13 causes a predetermined motion to be imparted to the plunger 14.

According to my invention, the stroke ot the plunger 14 may be varied by providing a second abutment 51 for the end of `the pivoted tongue 49. As shown, the abutment 51 may comprise an inner end ot a rece fs 52 formed in a lower wall 53 of the main slot 45. A lower side 54 of the recess 52 constitutes a lower track tor the tongue 49. An opposite end 55 of the recess 52 may be inclined parallel to the plane of the tongue 49 when the latter is positioned to engage the lower track;

When the driving member 19 is actuated so `as to'eause the tongue 49 to engage the inner abut-ment 51, motion is imparted to the plunger 14 and the extent of this motion is dependent upon the spacing of" the abutments 47 and 51. In the present illustration, thestroke of the plunger 14 is increased over that aforded by the upper track 48. lVhen the driving member 19 moves in an opposite direction, the support-ing pin 37 is actuated into engagement with'the outer end 47 of the main slot 45, inasmuchas the pin 37` is mounted in alignment with the same, and

the engagement with this end of the slot 45 causes a. return movement of plunger 14.

l In order that the tongue 49 `may be retained in either ofthe positions just described but yet be manually movable from one tothe other, I provide a weighted member 5() of the fornishown in Fw 6. This be actuated a predetermined distance inde-Y pendent-ly of the pin 37- and the tongue 49.

The extent of the predetermined movement just mentioned is illustrated in Figs. 2 and 3. In the former figure, the position ot' the weighted element 5()` ie such that it tends to cause the tongue 49 to engage the lower track 54 formed `by t-he recess 52, whereas in the latter ligure, the position of the weighted member 5() is such that the tongue 49 is caused to engage the upper track 4S toi-med by the main slot 45. Hence, it is appa-rent that by actuating the weighted member l5()` in the 'proper' direction, the tongue 49 may be moved from co-operative relation with one abutment into cooperative relation with `another abutment and thereafter retained in either position with a force determined by the Weighted member 50.

In oper-ation, assuming the tongue 49 in its lower position shown in Figs. 1 and 2, the operation of the crank 12 causes the pin 37 and the tongue 49 to co-act with therespective abutments 47 and 51, imparting the maximum stroke to the plunger 14. lVhen it isdesired to change the stroke of the plunger 14, the weighted member 50 is actuated from the position shown in Figs. 1` and 2 to that shown 1n Fig. 3, wherein the tongue 49 is caused to engage the upper track 48. The reciprocation of the driving member 19 then causs-the pin 37 and the tongue 49 to engage the respective abutments 47 and 46, imparting a stroke tothe (ill Lenses movable element tending to maintain the same in either ot' said positions.

2. A driving member, a driven member, and means i''or so connecting said members that the stroke ot' one of saidmembers may be varied, said means comprising a pairiofl tracks formed on one oit .said members and an element carried by the other and movable from one track to the other. i

.ik driving member, a y,driven member, and stroke-varying meansv interconnecting said members, comprising a movable element carried by ,one of said members, the otherot said members'being provided with spaced abutments defining a plurality of tracks, said element being movable from one track to the other. a 4. In combination, a driving member, a driven member, and means tor operatively associating the same, whereby saidfdriven member. may havea plurality of strokes, one of said members being provided with a pair of spaced abutments, said means in- Acluding an element movable into engagement with one or thc'other oft' saidabutments, said element beingwveighted to retain the same in any one of a number. of predetermined positions. M n 5. Stroke-adjusting apparatus'v comprising swinging driving and driven members, and means for so interconnecting v.said members as to provide an adjustablelost-mof tion connection therebetween, 'one of said swinging members having a pair of spaced abutments providing separate strokes there,- for, said means including an 'el-ement can ried by the other oi' vsaid swingingmem# bers and movable into engagementwith one or the other ot' said abutments depending` upon the desired stroke. i

6. In stroke-adjusting mechanism, the combination with a driving member, of a driven member, and means Yfor so operative`- ly associating the same that said driven member may have a plurality of strokes, said driven member being provided with a pair of tracks having one part in common, said means including an element movable on one or the other oi said tracks.

7. In strokeadjusting ,mechanisnn the combination with a driving member, of a driven member, means for so operatively associating` the same that said driven member may have a plurality of strokes, said driven member being'provided `with a pair tot tracks having one part incommoin vsaid means including an element movable on one or the other of said tracks, and means tending to retain .said element` on the desired track@ j f, k f 8. In stroke-adjustingv 'mechanism Vthe combination with a driving member, offa driven men'iber,l means l'oi" operatively, as@ sociating the same', whereby ysaid driven member may .have a'plurality of strokes, said driven member being provided withv a pair of tracks having one part thereol vin common, said meansincluding an element .carried by said driving member and movable into engagement with one or the otherot ,said tracks, and a weight so associatedwith said element as to tend tomaintain tlie;same in engagement withthe desired track. 9. Stroke-adjusting apparatus connjrising a pivoted tongue adaptedto engage sucf cessively a plurality of abutments spaced to ali'ord strokes of dilierent lengths, and `a weighted ymember so associated with said element that it tends to maintainthe 4-same in a position to engage the desired abutment. l0. Stroke-adjusting mechanism for' a stoker ram comprising a, fulcrumed member adapted to engage successively..aplurality of abutments spaced to afford. the -ram dii"- erent strokes, and means having a lost-mo tion connection with said member movable between predetermined positions, said means being 'operable in each position to. exert a force on Isaid member tending to maintain the same in a position to engage the desired abutment. I

. .711. 4Stroke-adjusting i mechanism A.for a plurality of `abutments defining different `strokes for said ram, and means for actuat-` ing said movable element but having a lostmotion connection therewith, said-means in one positiontending to cause said element to. engage `one of said abutmentsA` and in another position .to cause said element tol engage another ofsaid abutments. i

12. In combination, a driving'membenal driven member having an abutment, means for slidably mounting said driven member on said driving member, said means having a projecting portion movable into engagement with said abutment, and means operatively associated with said tiret-mentioned means tending to maintain said projecting portion in a posit-ion to engage said abutment.

13. A driving member, a driven member having a plurality of spaced abutments, means :tor slidably mounting said driven member on said driving member, means eX- tending from said first-mentioned means so as to'be movable 'from a position to engage one abutment to a second position permitlll() tinA engagement with another abutment, an means tending to maintain said second# mentioned means 1n one or the other of said positions. y

14. A driving member, a driven member having aylongitudinall extending slot, a pin mounted on said riving member and movable in said slot, and a tongue projecting from said'pin and movable into `engagement with one end of said slot, whereby motion may be imparted to said driven member durin at least a portion of the stroke of said riving member. y

15. A driving member, a driven 4member provided with a longitudinally extending slot, a pin extending from said driving memt ber into engagement with said slot so as to Vprovide a slidable su port for said driven member, means exten ing from said .pin so as to be movable into engagement with one end of said slot, whereby motion 'may be imparted to said driven member during at least a portion of the stroke of said driving member, and means tending to maintain said projecting portion in engagement with one Wall of saidA slot. c

16. A ydriving member, a driven member having a slot adapted to receive a supporting pin extending from said driving member, said pin beingmovable into engagement with one end of said slot when actuated in one direction, and a tongue extending from said pin and movable into engagement with the other end of said slot When said driving member is actuated in the opposite direction.

17. A driving member, a driven member having a slot providing atleast one abut` ment at'one end and arplura'lity of abutments at the other end, a pin for supportf ing said driven member on said drivingv member, and a tongue Vextending.from said pin adapted to lcooperate with the desired one of said plurality of abutments. Q

` 1,8. A driving member, a driven member having a slot providing at least one abutment at one` end and a plurality of abutments at the other end, a pin for supporting said driven member on said driving member, a tongue extending vfrom said pin adapted to engage one of said plurality of abutments, and a Weighted element so mounted on said pin as to tend to maintain said `tongue, in a position to engage the desired one of said plurality of abut-ments.

19.` A driving member, a driven member having a slot providing a common abutment at one end and a luralit of abutments at the other end, a pm .for s idably supporting said driven member on said driving member,- a tongue extendlng from one side of sald `pin source and to said plunger, the latter memf v ber having a pluralityof tracks terminat` ingin abutments, a supporting element eX- tending from the ovver-driven member and movable in one irection into engagement with one end of said tracks, a projecting portion from said in movable intoengage- `ment with one of t e abutments at the other end of `said tracks, and means tending to maintain said projecting portionin the posiutionnecessary to traverse the desired one of said tracks. t

21. Stroke-adjusting mechanism for a Stoker ram comprising a driving member, a driven member, one of said members comprising a pair of spaced 'elements vvith'the other member disposed therebetween andV provided `With a slot having -abutment-s deining diierent strokes, and a pin disposed in said slot fand mounted on said spaced elements so as to provide a slidable support for said slotted member,fs`aid pin being adapted to co-operate withsaid abutments.l

CLIFFORD E. HARRISON. 

